If anyone is planning a trip to the City of Valencia I would strongly recommend using the Tour Bus. It is 8€ for a 24hr ticket, so you can get on and off throughout the day, it is the best way to see everything in a short time, especially if only on a flying visit. If you are around for a bit longer it also gives you a quick run through of the places you can then go back and visit on another day in more depth! There is a commentry via head phones in several languages which is very interesting, one member of my family loves to go on it everytime he visits, and I must admit I have been 3 times now, and I live here!
I would never have gone on a tour bus back in UK, always thought them a waste of time and money, I will definately make them my first stop from now on whenever visiting cities in Spain.